JPS6293182A - Device for folding and feeding sheet material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to folding/feeding devices used in web printing operations.

[Conventional technology]

In this type of printing operation, a continuous web of paper is printed one after another. Next, the printed web is generally subjected to the following processing. That is, the web is passed through an opening for drying, and the web emerging from the opening is passed through a cooling system for cooling.

The web is then passed through a cutting/folding section and a feeding section. One method of forming longitudinal folds in a web is to pass the web along the nose of a triangular forming plate; When the edges of the web are pulled downwardly across the forming plate, a continuous fold will be formed in the web downstream of the nose of the forming plate in the direction of its movement. Once folded in this manner, the web can then be fed to a cutting/folding device consisting of a number of rollers. This kind of cutting/
In the folding device, a first web-receiving cylinder is adapted to quickly hold the web with pins arranged in a row along its length, the web being pierced by the pins; As the cylinder with the pin rotates, it gets caught up around it. The web thus captured is cut at that point by a cutter, typically a rotating cylinder with blades. In this case, the blade of the bladed rotary cylinder will be applied to the first cylinder and the web entrained by that first cylinder will be cut into individual sheets. A tucker blade is disposed within the pinned cylinder and projects outwardly across the length of the pinned cylinder so that the cut portion of the web, i.e. the central portion of the sheet, is moved into the pinned cylinder. It is designed to push the object away from the surface of the object. Then another cylinder, a cylinder with jaws, is adapted to pull the sheet from the pinned cylinder by its jaw-forming gripping plate at the lift wing in the upright position, and the sheet is folded again, but its The folding is done horizontally.

It may be necessary to refold sheets that have been folded as described above. Conventionally, such re-folding work is performed by a chopper folding machine. Such a folding operation results in a series of folded sheets moving at the same speed as the web and spaced apart at intervals approximately equal to the length of the individual sheets. The length of such spacing depends on the transverse folds made in advance. The edge of the sheet folded by the chopper folding machine becomes the front edge. However, conventional chopper folding machines require a sheet flow rate of less than about 1100 feet (330 meters) per back. Such travel speeds are much lower than the linear speeds of many printing presses, which can operate at approximately 1800 feet (540 meters) or more per back. Therefore, with conventional chopper folding machines, printing operations are subject to speed limitations.

Such a speed limit is necessary because individual sheets can be damaged when they collide with the stop plate before folding.

The conventional chopper folding machine as mentioned above generally has 3
It consists of three parts: a reduction part, a folding part and a feeding part. The speed of the incoming sheet may be reduced somewhat by first passing it under hanging brushes, but the sheet is fed into a reduction section between the upper and lower sets of conveyor belts. , it is stopped by a collision with the stop plate. After such stop, the sheet is longitudinally folded by reciprocating folding wings. In this case, the folding wing falls from above the sheet, passes through the plane of the sheet, and enters a longitudinal groove provided in the sheet support deck. After the folding operation, the folding wings will return to their original initial position and be ready for the next sheet.

Such a folded sheet, that is, a sheet pushed through the deck plate by the folding wings and folded, is immediately received by a nip roller device,
The sheet will be pressed by the nip rollers to ensure its complete folding. The sheets are then fed from the nip rollers to a vaned wheel type collector which receives the sheets in a continuous comb as it rotates and deposits them onto a feeding conveyor in the form of roof tiles. to be deposited. The sheets thus stacked are sent to a stacker or other processing location by the feeding conveyor.

Conventional sheet folding devices such as those described above have various problems. First, folding machines such as those described above with pins and grippers employ complex cam drive systems that are relatively susceptible to failure. Also, such folding machines inevitably produce a considerable amount of sheet material as waste material. This is because the sheet edge pierced by the pin as well as the edge cut by the serrated knife blade must be trimmed. Moreover, the operating speed of the cam drive system as described above is low compared to the potential operating speed of the printing press, while
In the chopper folding machine, the incoming sheet is
The seat cannot be moved at a speed greater than approximately 1100 feet (330 meters) per back, otherwise the seat will be damaged if it hits the stop plate, or the seat shape is not rectangular. It will shift. In most chopper folding machines, the folding blades operate in a simple reciprocating motion, yet move at very high speeds when first striking the sheet to be folded. In such a collision, the sheet will be pushed forward at the folding wing position. This is because the folding wing reaches its maximum speed before impacting the sheet, and its speed is reduced upon impact. Therefore, all of the energy at the time of the collision is instantly absorbed by the sheet, and as a result, when the sheet is rapidly passed through the groove of the deck plate following the movement of the folding blade, the outer edge of the sheet becomes whiplash. You will perform the same movements as before. In the feed section of the chopper folder, the front edges of the sheets may be distorted as they are fed into the above-mentioned collectors. Additionally, the weight and inertia of the incoming sheets actuate such collectors, limiting their speed of operation and causing uncontrolled feeding operations. Such problems are
It is even worse in the case of lightweight seats which can cause jamming at high operating speeds.

[Object and structure of the invention]

In accordance with the present invention, the above-mentioned problems associated with conventional chopper folding machines are avoided by providing a controllable reduction section, folding section and feed section.

It is therefore an object of the invention to provide a sheet folding device in which an incoming sheet is slowed down in a controlled manner without damaging its front edge.Another object of the invention It is a further object of the present invention to provide a folding device in which the movement of the folding wings is controlled in such a way as to minimize damage to the sheet during operation. It is a further object of the present invention to provide a feeding device which decelerates the sheets and arranges them in the form of a roof tile.It is a further object of the present invention to provide a feeding device which reduces the speed of the sheets and arranges them in the form of a roof tile. It is an object of the present invention to provide a folding device in which jamming caused by sheet movement under uncontrolled conditions is avoided. Yet another object of the invention is to provide a high-speed folding device which is simple and practical in construction and is adapted to operate with sheets of any weight.

According to one aspect of the invention, the first deceleration section includes a support conveyor belt adapted to operate at a slower speed than the incoming sheet, and a supporting conveyor belt configured to synchronize the arrival and timing of the incoming sheet. A pair of rotary brake wheels are provided for pressing the rear portion of each sheet against a low speed support conveyor belt. After the seat has been decelerated in this way without damage, it can be stopped by the stop plate without damaging its front end.

According to another aspect of the invention, the folding wing is operated under cam control, such that the movement of the folding wing can be totally predetermined. Specifically, the folding wings are controlled to have as short a stroke as possible and are brought into contact with the sheet while still under acceleration. Contact between the folding wing and the sheet is maintained and its velocity is increased smoothly, which allows the impact energy to be dissipated over a relatively long period of time and prevents the sudden movement of the tip against the sheet edge. The impact will be reduced. In this way, the folding wings are decelerated and the sheet continues to move toward the receiving roller. Note that the receiving roller creases the sheet and conveys the sheet to the feeding section.

Yet another aspect of the invention is directed to a feed section that operates in the same manner as the reduction section, but for sheets of any weight. Such a feed section is also provided with at least one rotating brake wheel and a low-speed conveyor belt adapted to support the sheets at the feed section. To such a feed section, sheets are fed at high speed by opposing high speed conveyor belts.

The lower high-speed conveyor belt ends before the feed section.

Also, the low speed conveyor belt begins exactly at the downstream end of the lower high speed conveyor belt and is positioned sunk relative to the plane of the lower high speed conveyor belt. In the first deceleration section, the incoming sheets are decelerated, and the gap between the sheets is narrowed.
In the feeding section, a rotary brake is used to catch the rear part of the continuous sheet against a low-speed conveyor belt that is lowered downward, thereby slowing down the sheet and arranging it in a roof tile shape. become. In order to account for differences in sheet weight, the rollers that define the folds of the lower high-speed conveyor belt are adjustable in the direction of sheet movement, thereby preventing sheets from jamming, especially lightweight sheets. This allows for many adjustments to be made.

〔Example〕

For a more complete understanding of the invention, it will now be described by way of example with reference to embodiments that are illustrated in detail in the accompanying drawings.

The relationship between the various components of the invention, as well as the operation of those components, will be more clearly understood from the following description; however, the embodiments of the invention described below are merely illustrative. be shown,
It is not intended that the invention be limited to this example.

On the other hand, the attached drawings are not to scale,
It should be understood that the embodiments depicted therein are shown diagrammatically and with parts thereof broken away. Furthermore, it is to be understood that in accordance with some of the illustrated embodiments, details not necessary for an understanding of the invention, such as details of conventional construction, have been omitted.

In general, the sheet folding device according to the invention is intended for folding and tiling printed products and is intended to be integrated into a complete printing system. The sheet folding device according to the present invention is used after actual printing and cutting operations and prior to stacking and counting operations.

According to the present invention, printed sheets arranged in the form of roof tiles are prepared for stacking and counting operations, but the present invention is compatible with other folding devices designed to perform double folding on sheets. It can also be used in conjunction.

In the sheet folding apparatus described above, sheets are fed between two sets of closely spaced and oppositely disposed high speed conveyor belts at high speeds of about 1600 to 1800 feet (480 to 540 meters) per minute. At this time, if the individual sheets are separated by an interval that does not exceed the length of one sheet even slightly, the interval is at least the length of one sheet. In this case, the sheet has already been folded only once in the longitudinal direction. Continuing from there, the lower of the two sets of high-speed conveyor belts mentioned above ends, and is replaced by a series of low-speed conveyor belts, which have a speed of about 1100 per minute of light. It is designed to operate at foot (330 m) speeds. For such a series of slow conveyor belts, the lower series of high-speed conveyor belts is separated from the upper series of high-speed conveyor belts by a distance greater than the distance that the lower series of high-speed conveyor belts is separated from the upper series of high-speed conveyor belts. The sheet enters the area at high speed and is decelerated by a pair of free rotating brake wheels.

Such a brake wheel is free to rotate about an axis attached to a cam, which is timed to rotate with the incoming sheet, so that each sheet is The rearward region of the conveyor belt is actively restrained against the aforementioned lower series of low-speed conveyor belts and the lower deck plate. In this way, the sheet will be effectively slowed down to the speed of the lower, slower transport belt. On the other hand, the sheet will not be damaged when it collides with a stop member aligned with the chopper folding means. This is because the seat is decelerated to a sufficiently low speed condition that it can withstand a collision with the stop member and maintains its structural integrity. Note that the deck plate may be omitted, in which case the sheet will be caught only on the lower low-speed conveyor belt.

At or just before the collision with the stopping means, the edge of the folding wing or folding plate hits the centerline of the sheet in its longitudinal direction, causing the sheet to be forced between the two deck plates and unrolled. into the grips of opposing high-speed nip rollers. Such a folding plate is actuated by a box-shaped cam arrangement. As soon as the sheet reaches or just before the stop, the box-shaped cam arrangement is timed to actuate the folding plate. A pair of brushes are also provided following the brake wheel to prevent damage to the seat. That is, when the folding plate collides with the sheet and the first set of nip rollers facilitates sheet separation, damage to the sheet is prevented by limiting extensive swinging of the sheet edge. It turns out.

After the sheets are folded in half, they are removed from the folding machine by a series of abutting nip rollers.

These presses are caused by the nip rollers to accelerate the movement of the sheet and to fold the sheet into permanent folds. After the sheet is ejected from the last pair of nip rollers, the sheet is moved between another series of closely spaced and oppositely disposed dual high speed transport belts. At a subsequent point, the lower high-speed conveyor belt ends and is replaced by a lower-speed conveyor belt located further away from the upper high-speed conveyor belt. The lower high-speed transport belt may be horizontally positionable, in which case the sheet exit position can be adjusted to accommodate sheets of various sizes and weights.

The folded sheet enters such an area between the slow and fast conveyor belts and is slowed down by a pair of dual brake wheels. These brake wheels are rotated about axles attached to opposite ends of the cam. the cam is timed to rotate with the incoming sheet;
This causes the brake to actively hold back the rear region of each sheet against the lower series of low speed transport belts. Note that this is almost the same as the case of the first brake wheel described above. As each sheet is decelerated in this way, the brake wheel rotates away from the sheet surface, so that the next sheet moving at high speed overlaps the previous one and The speed will be reduced by the action of two sets of double braking wheels. As a result, the sheets are folded and arranged like roof tiles.

The tiled sheets are now ready to proceed to the next operating location in the printing system, such as a counting or stacking location.

To explain the invention in more detail, a continuous stream of sheets (in such a stream each sheet is separated from the next by a distance approximately equal to its length) is processed by a chopper folding machine according to the invention. 10 between an upper series of high-speed conveyor belts 12 and a lower series of high-speed conveyor belts 14. The upper conveyor belt 12 and the lower conveyor belt 14 are arranged facing each other and in a closely spaced relationship. The upper conveyor belt 12 includes a series of pulleys (not shown) mounted on a drive shaft (not shown), a first set of pulleys 16 mounted on a free-rotating shaft 18, and a first set of pulleys 16 mounted on a free-rotating shaft 22. The hook is passed between two sets of idler pulleys 20. Such drive shafts are driven directly from the printing press. Upper series of high speed conveyor belts 12
The tension can be adjusted by changing the position of the idler pulley 20 by means well known in the art. As shown in FIGS. 1 and 2A, the pulley 20 is free to rotate about an axis 22 that is mounted on one end of an adjustable bracket 23. As shown in FIGS. Bracket 23 is positionable by commonly known means around bar 25, which bar 25 is attached to bracket 27 fixed to frame 11.

The lower series of high-speed conveyor belts 14 has an idler pulley 24 mounted on an idler shaft 26 and a printing press (not shown).
The hook is passed to a drive roller (not shown), which is driven by a drive roller (not shown). The idler pulley 24 indicates the end position of the lower high-speed conveyor belt 14.

The second lower series of conveyor belts 28
A first lower series of low speed conveyor belts 14 follows that conveyor belt 28 just before heading to the area where the sheet 3o is to be folded, running at a relatively low speed on the order of 0 feet (330 meters).

The lower series of low-speed conveyor belts 28 is spaced from the upper series of high-speed conveyor belts 12 such that the spacing is between the lower series of high-speed conveyor belts 14 and the upper series of high-speed conveyor belts 12. greater than the interval. The lower low speed conveyor belt 28 passes over a series of idler pulleys 32 mounted on a free rotating shaft 34 and a series of drive pulleys 36 mounted on a drive shaft 38. A reduction gear 40 is also attached to the shaft 38, and this reduction gear 4o is driven by a gear 42 attached to the shaft 18. The lower series of low speed conveyor belts 28 can also be driven by a separate variable speed drive as is well known in the art.

In order to stop and fold the sheet 30 without damaging it, the sheet 3o is decelerated by a brake wheel 44, which is free to rotate about an axle 46 attached to one end of a brake cam 48. It has become. On the other hand, the braking cam 48 is attached to the shaft 50,
A timing pulley 52 is provided at one end of this shaft 50 (FIG. 2A). Timing pulley 52 is driven directly from the printing press by timing belt 54. Both ends of the shaft 50 rotate freely within bearings 54 mounted on brackets 53, which are laterally slidable within the frame 11, thereby allowing the seat 30
The position of the shaft 50 can be adjusted along the path.

As the individual sheets 30 are ejected between the upper high-speed transport belt 12 and the lower high-speed transport belt 14, a brake wheel 44 engages the rear portion of each sheet 30 to lower the sheet 30. It is pressed against the low-speed conveyor belt 28 on the side and the deck plate 56 below it. Note that the deck board 56 is attached to the frame 11. Since the brake wheel 44 can rotate freely, the seat 3o will not be damaged during sudden deceleration. The brake wheel 44 may be made of an elastically deformable or compressible material, such as rubber, in which case the prevention of damage to the seat in the event of a collision with the brake wheel 44 is further improved.

Regarding the timing between the brake wheel 44 and the brake cam 48,
Any sheet 30 is folded in such that it has made exactly one revolution around shaft 50 when the next sheet 30 arrives to be decelerated by brake wheel 44.

Once the seat 30 is decelerated and stopped by the brake wheel 44, the seat 30 is brought to a complete stop by the stop member 58. Note that the stop member 5 is rigidly attached to the frame 11. Even in such a rapid stop state, the seat 30 will not be damaged. This is because the velocity at the time of the collision is relatively low. Next, the folding plate 60 is lowered, and each sheet 3
It is accelerated over a predetermined distance through collision with the centerline section of 0. The folding plate 60 continues to descend, but the folding plate 60 is gradually decelerated as the sheet 30 is forced between the two deck plates 56 and captured by the first pair of abutting nip rollers 61 and 62. on the other hand,
When the sheet 30 is folded in half by the folding plate 60, the outer edges of the sheet 30 are restrained by a pair of brushes 64 so as to prevent the sheet 30 from making sudden movements like the tips of a whip. Note that the pair of brushes 64 are attached to the shaft 50.
and is balanced by a weight 66. With this arrangement, brush 64 prevents damage to the seat that may occur as a result of rapid actuation according to the present invention.

The folding plate 60 is attached to one end of an arm 68 and is caused to reciprocate by interacting the other end of the arm 68 with a box-shaped cam 70.

As shown in both FIGS. 1 and 2A, arm 68
is rigidly attached to a shaft 72 by a sleeve-shaped bracket 74, which shaft 72 is rotated within a cylindrical mounting bracket 76 provided and cut into the frame 11. The reciprocating movement of the arm 68 and hence the reciprocating movement of the folding plate 60 is caused by the action of both cam followers 78 and 80.
is rotated about a shaft 82 attached to arm 68. The inner cam follower 80 contacts the cam surface 84 of the box-shaped cam 70, ie, the cam surface 84 having a relatively smaller diameter, and the outer cam follower 80 contacts the cam surface 86 of the box-shaped cam 70, ie, the cam surface 84 having a relatively larger diameter. It contacts the cam surface 86 which has a . Note that the box-shaped cam 70 is rotated around a camshaft 88.

The camshaft 88 is rotated within a bearing 89 mounted on the frame 11. Camshaft 88 is operatively interconnected to a drive shaft 91 (FIG. 1) of a motor (not shown), which drives camshaft 88.
8 will be driven. Needless to say, the cam surface 8
It is also possible to adopt a configuration in which both 4 and 86 are separated.

In this case, each cam surface would realistically be formed into two cams placed in abutting relationship.

In such embodiments, cam surfaces 84 and 8 may be modified by changing the relative positions of the two separated cams.
Since the profile of each of the arms 68 and the folding plate 60 can be adjusted and changed, the movement of the arm 68 and the folding plate 60 can be varied without using new cams.

When the sheet folding operation is completed, a crease is applied to the sheet by the action of high speed abutting nip rollers 61 and 62. Left nip rollers 62 and 64' (FIG. 2A) are rotated in bearings 90 fixedly mounted on frame 11 (FIG. 1). The timing belt 92 is driven by a timing gear 94 mounted on the camshaft 88, and the timing belt 92 drives the left nip rollers 62 and 64' (second A
(Fig. 3) will be driven via pulleys 96 and 98 (Fig. 3) provided on their respective shafts 100 and 102. The tensioned state of the timing belt 92 is determined by the tensioning means 1.
04, it can be adjusted freely.

The tensioning means 104 comprises a pulley 106, which pulley 10
6 is rotatably attached to one end of the tension bracket 108 by a pin 110. Pulley 106 can be adjustably positioned by pivoting bracket 108 about bin 112 which is fixedly mounted to frame 11. The other end of the bracket 10 is provided with an arcuate slot 114 into which a threaded lug 11 is fixedly attached to the frame 11.
6 is passed through, thereby restricting the movement of the bracket 108.

A lug nut H1B is engaged with the threaded lug 116 to lock the tension plaque 10B in place.

The right nip rollers 61 and 63 (Fig. 2A) are connected to shaft 1.
20 and 121 and biased by air cylinder 122 as shown in FIGS. 1 and 3. Such biasing is accomplished via a pair of piston arms 12G mounted to shaft 120 by bracket 126. Such a configuration allows the right-hand nip rollers 61 and 63 to be laterally adjustable, which facilitates the folding operation of the sheet 30 and provides compatibility with relatively thin sheets.

In operation, the centerline portion of each sheet 30 is connected to the folding plate 60.
At this time, the sheet is caught by a first pair of high-speed nip rollers 61 and 62, and these high-speed nip rollers 60 and 6
2, the folding of the sheet 30 is completed and a crease is imparted thereto. The high speed nip rollers 61 and 62 also feed the sheet 30 to the next pair of high speed nip rollers 63 and 64'.
By a pair of high speed nip rollers 63 and 64',
Sheet 30 is fed to a second high speed conveyor system. In this case, the sheet has approximately 2000 feet (6
00 meters) is provided by the nip rollers mentioned above. It goes without saying that the speed of the nip rollers can be changed depending on the length of the sheet. For example, the longer the sheet length, the faster the speed of the nip rollers will be required so that sheet stagnation can be avoided.

The second high-speed transport device is comprised of two high-speed transport belt assemblies consisting of a series of transport belts that are closely spaced from each other and arranged opposite each other. The transport belt 128 of the first high speed transport belt assembly passes through three sets of rollers. 1st
The sets of rollers 130 are freely rotated about a common shaft 132 such that the rollers 132 can be adjustably positioned about a pivot axis 134 by well-known adjustment means 136. Adjustment means 13
2 is provided with two setscrews and a locking nut (FIG. 2B). The position of the first set of rollers 130 is adjustable to accommodate sheets of different thicknesses. A second set of rollers 138
2 is rotated around a shaft 140 attached to the shaft 140. Arm 142 is adjustable about pivot axis 144 and is spring-loaded to frame 11 by common spring means 144', which provides constant tension on conveyor belt 128. A third set of rollers 146 is attached to a shaft 148 mounted on a bracket 150.
The bracket 150 is rotated around the frame 11, and the bracket 150 can be positioned horizontally with respect to the frame 11.

The conveyor belt H52 (FIG. 2B) of the second or inner high-speed conveyor belt assembly is passed over three rollers, and each conveyor belt 152 is provided with a tensioning means 104 as previously described. adjustable tensioning means 154 similar to
is provided. The running profile of high-speed conveyor belt 158 is defined by idler rollers 156 and 158. Driving force is applied to the high-speed conveyance belt 158 by a drum 160. The drum 160 receives its driving force from the camshaft 88.
through a gear train, which gear train includes gears 162 .
164, 166 and 168 (Figure 2B). Also, the conveyor belt 1 of the first high-speed conveyor belt assembly
28 is also simultaneously driven by drum 160 through frictional contact with second high speed conveyor belt assembly 152.

Conveyor belts 128 and 1 in the second high-speed conveyor
The speed of 52 can also be adjusted depending on the size of the sheet. By reducing such speed, the second high speed conveyor belt device may sometimes act as an intermediate speed reducer between the nip rollers and the feed device.

The idler roller 146 may be laterally adjustable to adjust the position of the sheet exit between the high speed transport belts 128 and 152.

Because of this horizontal or lateral AUI capability, the present invention provides compensation for changes in seat size and weight that would cause the seat to behave differently during actuation. I can do it.

Of course, if the chop folding device according to the invention is used only for sheets of only one size and weight, the idler roller 146 can also be permanently fixed in one place. A deck plate 170 is provided below the lower high-speed conveyor belt 128 , and the deck plate 170 is disposed adjacent to the idler roller 146 . The deck plate 170 is attached to the frame 11 and functions to support the sheet as it is ejected from between the remote conveyor bells I-128 and 152. The first series of lower high speed conveyor belts 128 is followed by a second series of lower speed conveyor belts 172, which second series of lower conveyor belts 172 has a speed of approximately 250 feet per minute. (75
meters) are driven at low speeds.

The lower low-speed conveyor belt 172 is the upper high-speed conveyor belt 1
52, but the spacing is greater than for the lower high speed conveyor belt 128. The lower low speed conveyor belt 172 passes over a series of idler pulleys 174 mounted on a shaft 176 and a series of drive pulleys 178 mounted on a drive shaft 180. The drive pulley or drive roller may be driven by a direct linkage to the printing press via a reduction gearing (not shown) or by a separate drive (not shown). good. Since both of these drive systems are well known in the technical field, a detailed explanation thereof will be omitted.

The sheet 30 is decelerated and tiled by a dual brake with two brake wheels 182 and 183 in preparation for the next subsequent operation. Brake wheels 182 and 183 are allowed to rotate freely about shafts 184 and 185 attached to opposite ends of brake cam 186, which
It is installed on 8. Driving force is applied to the shaft 188 from the camshaft 88 via a gear train, which is comprised of gears 162, 164, 190, and 192. Gear 162 is attached to camshaft B8 and gear 190 is attached to brake shaft 188.

Here it is necessary to use a dual brake as described above rather than a single brake wheel as used to slow down the sheets before folding them. on the other hand,
Here, the interval between the sheets is reduced for folding the sheets and for subsequent deceleration by the nip rollers 61 to 64. However, in order to reduce the velocity of the sheets to about 250 feet (75 meters) per minute, longer contact times with the individual sheets are required. When using a single braking wheel, to capture sheets closer together,
Since it is necessary to further increase the operating speed of the brake wheel, the contact time with each sheet cannot be maintained for the required length. Therefore, a dual brake that operates at a relatively low speed is used to provide a relatively long contact time with the seat. Preferably, the brake shaft 18
8 and the printing press are rotated at a speed ratio of A:1.

As the sheet 30 is ejected from between the upper high-speed conveyor belt 128 and the lower high-speed conveyor belt 152, one of the brake wheels 182 and 183 engages the rear portion of the folded sheet, causing the sheet to Lower low speed conveyor belt 1
72 is pressed. Braking wheels 182 and 18
3 may be made of an elastically deformable or compressible material, for example rubber, in which case damage to the seat in the event of a collision with a brake wheel will be more effectively prevented.

By means of tensioning means 194, as is well known in the art, as described above in connection with tensioning the conveyor belt 128, the lower low speed conveyor belt 172 is kept taut so that the folded sheet can be captured as described above. become able to. In addition, in such places, place the deck board on frame 1.
1 and located below the lower low-speed conveyor belt 172, in which case additional braking support would be provided. As the first brake wheel 182 decelerates the folded sheet and lifts it away from its surface, the next sheet is ejected from between the upper high-speed transport belt 128 and the lower high-speed transport belt 152. Become. This latter seat is overlapped by the former decelerated seat, which itself is decelerated by the second brake wheel. Since each brake wheel 182 and 183 is allowed to rotate freely, the seat will not be damaged during deceleration. The provision of a pair of guide plates 196 and a series of control rollers 198 ensures that the sheets do not become misaligned during deceleration and that the shingled sheets are transported to the next counting and stacking station. positioned so that it can be sent.

The side guide plate 196 is attached to the frame 11. Control roller 198 is freely rotated about axis 200. Both ends of the shaft 200 are attached to a bracket 202,
This bracket 202 is pivoted about a pin 204. The bin 204 is adjustable within the frame 11,
This allows the position of control roller 198 to be adjusted transversely to the path of the sheet exiting the apparatus. With such a configuration, the control roller 198
can be adjusted as the seat size changes.

The above description merely describes one embodiment of the present invention, and it goes without saying that the present invention is not limited to the above-described embodiment. In summary, it will be apparent to those skilled in the art that various modifications may be made to the embodiments described above, as well as other embodiments embodying the principles of the invention.

[Brief explanation of drawings]

FIG. 1 is a side view showing the conveying device and the first braking means provided in the first deceleration section in a preferred embodiment of the present invention, and FIG. 2A is a side view of the folding section in the preferred embodiment of the present invention. Further, FIG. 2B shows a cross section of the exit side conveyance device following the folding part, and further shows the front view of the first braking means, and FIG. FIG. 3 is a perspective view of a preferred embodiment of the present invention. DESCRIPTION OF SYMBOLS 10... Chopper folding machine, 11... Frame, 12... Upper high-speed conveyance belt, 14... Lower high-speed conveyance belt, 28... Lower low-speed conveyance belt, 30... Seat, 44... Braking wheel, 48... Braking cam, 50... Shaft,
52... Timing pulley, 54... Timing belt, 5
6... Depth plate, 58... Stopping member, 60...
...Folding plate, 61, 62, 63, 64...Nip roller, 6
4...Brush, 68...Arm, 70.
...Box-shaped cam, 78.80...Cam follower,
84, 86...Cam surface, 88...Camshaft, 92...timing belt, 104...tensioning means, 128...lower high-speed conveyance belt, 152...upper high-speed conveyance Belt, 154... Tensioning means, 172... Lower low speed conveyor belt, 182, 183... Braking wheel, 186... Braking cam. Margin below

Claims (1)

[Claims] 1. A deceleration section for decelerating each sheet in the incoming sheet flow, and a folding section provided on the downstream side of the deceleration section, in which the folding section: A sheet folding device configured to sequentially fold sheets sent from the deceleration section to the sheet folding device, wherein the deceleration section includes a high-speed section consisting of a high-speed conveying means; is adapted to receive an incoming sheet and transport the sheet at its substantial linear velocity to an exit point of the high speed section, b. It includes a low-speed section located downstream of the high-speed section for receiving, the low-speed section consisting of a low-speed conveying means having a linear velocity much smaller than the linear velocity of the high-speed conveying means, and furthermore, c. disposed adjacent to and below the outlet point for discharging sheets from the outlet point into an area immediately above the low speed conveying means; c. further disposed at the upstream end of the low speed section; braking means driven in synchronism with the discharge of a stream of sheets from said high velocity section so that the trailing portion of each sheet discharged from the exit point of said high velocity section is A sheet folding device which is urged into engagement with said slow transport means by braking means so that said sheets are continuously transported relative to said folding station. 2. In the sheet folding device according to claim 1, the speed reduction section further includes a rigid deck plate means, and the rigid deck plate means reduces the speed of the low-speed conveyance in a region where the low-speed conveyance means presses the sheet. A sheet folding device, characterized in that it is arranged under and in contact with the means, thereby providing positive support to the low speed transport means. 3. In the sheet folding device according to claim 1, the braking means includes a plurality of cam elements, these cam elements are fixed to a common shaft, and the common shaft is configured to eject the sheets from the high-speed section. The outermost end of the extension of each said cam element is provided with a wheel which is freely rotatable and rotated in synchronization with and in the direction of the ejection sheets. Sheet folding device. 4. The sheet folding device according to claim 3, wherein the wheel of the braking means is compressible. 5. In the sheet folding device according to claim 1, the low-speed section further includes a second high-speed conveyance means, and the second high-speed conveyance means is located above and opposite to the low-speed conveyance means. the second high-speed transport means is arranged in a spaced relationship from the low-speed transport means to facilitate movement of the output sheet on the low-speed transport means; A sheet folding device characterized in that it has a linear velocity that is almost the same as that of a high-speed conveying means. 6. It is equipped with a deceleration section for decelerating each sheet in the incoming sheet flow that moves at an initial linear velocity, and a folding section provided on the downstream side of this deceleration section, in which the folding section , the folding is performed one after another on the sheets sent there from the reduction section, and further, the downstream side of the folding section receives the folded sheets from the folding section and transports them to a desired location. A sheet folding device comprising a feeding section provided with a feeding section, comprising: (a) a low-speed conveying means in which the low-speed section has a linear velocity much smaller than the initial linear velocity of the incoming sheet; braking means spaced apart from the face of said slow conveying means, said incoming sheet being directed between said braking means and said face of said slow conveying means; means are driven in synchronization with the arrival of the sheet;
This forces the rear portion of each incoming sheet into engagement with the slow transport means, after which the sheet is continuously transported to the fold. b. said folding section includes support means for receiving and supporting sheets from said low speed section, said supporting means having a predetermined position relative to the position of the sheet received and supported thereby; a slot oriented in relation thereto, said folding portion further being controllably reciprocated through said slot between a first position above said support means and a second position below said support means; a folding plate means adapted to engage and fold a sheet received and supported by said support means, said folding portion further comprising a folding plate means adapted to engage and fold a sheet received and supported by said support means; nip means positioned below the slot, the nip means receiving the folded sheet from the folding plate means, pressing the folded sheet to complete the folding, and transferring the folded sheet to the feed section; Sheet folding device designed to guide. 7. A sheet folding device according to claim 6, wherein said folding plate means is actuated by cam control, said folding plate means being accelerated through engagement with the sheet and through passage of said slot. A sheet folding device characterized by: 8. In the sheet folding device according to claim 6, a limiting means is provided for limiting the sliding movement of the sheet along the supporting means, and the limiting means is arranged at least between the folding plate means and the sheet. A sheet folding device, characterized in that the sheet folding device is arranged on both sides of the slot and above the support means when engaged. 9. The sheet folding device according to claim 8, wherein the limiting means comprises at least one brush fixed to the braking means, and the rear part of the sheet is controlled by the braking means to the low-speed conveying means. A sheet folding device, characterized in that, after being pressed upward, the brush is arranged above the support means in the manner described above. 10. The sheet folding device according to claim 6, wherein the folding section further includes a mechanism for stopping the forward movement of the sheet at a predetermined position above the slot of the support means and with respect to the support means. A sheet folding device characterized in that it includes stop means. 11. In the sheet folding device according to claim 6, the feeding section has a second linear velocity smaller than the linear velocity of the sheet fed from the folding section to the feeding section.
and a second braking means installed at a distance from the surface of the second low-speed conveying means, the sheet from the folding portion being disposed between the second braking means and the second braking means.
and the surface of the slow conveying means, and said second braking means is actuated in synchronization with the arrival of the rearward portion of each sheet, so that the rearward portion of each sheet is directed toward said second braking means. A sheet folding device characterized in that the sheet is pressed onto a low-speed conveying means such that the sheet is decelerated to the speed of the second low-speed conveying means. 12. In the sheet folding device according to claim 6, the second braking means of the feeding section includes a plurality of brakes fixed to a common shaft and spaced apart in the axial direction; each provided with two braking sections approximately 180° apart along the circumference of the common shaft;
characterized in that the common shaft is rotated in synchronization with the supply of sheets to the feed section, so that the brakes act alternately on the sheets fed to the feed section. Sheet folding device. 13. The sheet folding device according to claim 12, wherein the flow of sheets fed thereto is obtained from a printing operation by a printing cylinder, and the printing cylinder is operated at a predetermined rotational speed. A sheet folding device characterized in that the common shaft of the second braking means is rotated at a rotation speed that is half of the predetermined rotation speed. 14. A sheet feeding device for feeding sheets, comprising: a. first conveying means for receiving a stream of sheets and conveying the sheets to an exit location; said first conveying means are mutually adjacent; including closely spaced upper and lower conveyor belts for transporting the sheet between the conveyor belts at an initial linear velocity, the exit point being at the lower conveyor belt; a downstream end of the sheet which is folded back by roller means, said roller means being adjustable in the direction of movement of the sheet; and b. a second conveying means disposed downstream of the first conveying means to receive the sheet, the second conveying means having a linear velocity smaller than the initial linear velocity of the sheet at the first conveying means. a low-speed conveyor belt with a low-speed conveyor belt disposed below the sheet exit point of said first conveyor means, said second conveyor means further fixed relative to a surface of said low-speed conveyor belt; braking means spaced apart from said slow conveyor belt for receiving sheets ejected from said first conveying means and timed with the ejection of said sheets so that each The rear portions of the output sheets are successively pressed into engagement with the slow conveyor belt, thereby slowing each sheet to the speed of the slow conveyor belt and causing the sheets to be arranged in a tiled manner. sheet feeding device. 15. The sheet feeding device according to claim 14, wherein the braking means includes a plurality of braking arms fixed to a common shaft in a spaced manner, and the common shaft is connected to the first conveying A wheel is provided at the outermost end of the extension of each brake arm, the wheel being rotatable in synchronization with the ejection of the sheet from the means and in the direction of movement of the sheet, the wheel being freely rotatable. A sheet feeding device characterized by: 16. In the sheet feeding apparatus according to claim 15, the braking arm is further provided with two braking portions spaced apart by approximately 180 degrees along the circumference of the common shaft, and the braking means is A sheet feeding device characterized in that the braking portions are timed so as to act alternately on incoming sheets.